Students will be able to summarize the events that occur during meiosis and relate crossing over, law of segragation (Click Here!), independent assortment (Click Here!), and random fertilization to genetic variation. (Click Here For Video!)
Meiosis reduces the number of chromosomes by half to form reproductive cells. When the reproductive cells unite in fertilization, the normal diploid number is restored. (Click Here For Video!),
During meiosis 1, homologous chromosomes separate. Crossing over during prophase 1 results in the exchange of genetic material between homologous chromosomes. (Click Here For Flow Chart!)
During meiosis 2, the two chromatids of each chromosome separate. As a result of meiosis, four haploid cells are produced from one diploid cell. (Click Here For Video!)
Students will understand the role of spermatogenesis and oogenesis.
In sexually reproducing eukaryotic organisms, gametes form through the process of spermatogenesis in males and oogenesis in females. (Click Here For Video!)
Students will be able to differentiate between asexual and sexual reproduction, explain the different types and evaluate the genetic and evolutionary advantage and disadvantage between them.
Asexual reproduction is the formation of offspring from one parent. The offspring are genetically identical to the parent. (Click Here For Video!)
A disadvantage to asexual reproduction in a changing environment is the lack of genetic diversity among the offspring. (Click Here For the Video on Benefits!)
Sexual reproduction is the formation and union of gametes. The offspring are genetically different from the parents. (Click Here For Video!)
Sexual reproduction increases variation in the population by making possible genetic recombination.
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Unit 8 Packet Resources (Click Here!)